[Public-List] V berth water tank
mpcylinderheads at gmail.com
Sun Jul 21 05:45:53 PDT 2013
Did you coat inside of tank.
.if so with what type of epoxy
On Jul 21, 2013 7:39 AM, "David Terrell" <dterrell1 at charter.net> wrote:
> I did what George did and the result is excellent. I do not see a need
> for further changes. I used starboard for the top. Pictures and a
> description are posted on the web site.
> David 432
> On Sat, Jul 20, 2013 at 4:40 PM, George Dinwiddie wrote:
>> On 7/19/13 10:07 AM, Bill Newman wrote:
>>> My No. 233 is a non liner boat that I have owned for about 12 years.
>>> The water tank is fibreglass and is I believe, tabbed to the hull.
>> The usual arrangement is a tank that uses the hull and some laid up glass
>> to form the bottom and sides. The top was generally a sheet of aluminum
>> bedded and pop-riveted across the flanges of the sides.
>> The usual problems are that
>> 1. the fiberglas becomes saturated with water and slowly leaches into
>> the water
>> 2. the aluminum corrodes, flaking white aluminum oxide into the water
>> 3. the pop-rivets start to leak
>> Originally it had no inspection port so later I made one and found a
>>> very moldy plastic bladder inside the tank. I removed this and
>>> thoroughly cleaned the interior of the fibreglass tank and used this
>>> for a few years until it began to leak. I then cut a larger opening
>>> into the top and installled a bladder which does not conform well the
>>> the shape of the tank. If it is completely filled it bulges out the
>>> opening and leaks some water no matter how well the fittings are
>>> tightened. The result is that I cannot carry a lot of water with
>>> this arrangement. I do not use the tank for drinking or cooking just
>>> for washing myself and the dishes. I am thinking of temporalily
>>> removing some of the furniture from the v berth, then making a
>>> cardboard mock-up of a tank that fits the space and taking this to a
>>> tank maker to have it fabricated. I am thin king of having this made
>>> of aluminum because there are several companies who will do this and
>>> a mold is not required. I expect my experience is not unique. My
>>> question is. has anyone had any experience replacing the water tank
>>> under the v berth and if so any advice or information about how to
>>> proceed and the results will be much appreciated.
>> I would not recommend using aluminum. Like the original aluminum top, it
>> will oxidize and flake white aluminum oxide into the water.
>> The usual fix for the water tank is to
>> 1. remove the furniture
>> 2. remove the top of the tank
>> 3. clean the tank well
>> 4. coat the fiberglas walls with epoxy
>> 5. put on a new, non-aluminum top (high-density polyethelyne or
>> reinforced epoxy sheet) bedded with good caulk, and using self-tapping
>> screws instead of pop-rivets
>> If you do this and add a charcoal filter, you should have water suitable
>> for drinking.
>> Of course, you still need to clean the inside occasionally through a port
>> on the top, and you may want to dose with chlorine (plain chlorox) when you
>> fill the tank.
>> - George
>> When I remember bygone days George Dinwiddie
>> I think how evening follows morn; gdinwiddie at alberg30.org
>> So many I loved were not yet dead, http://www.Alberg30.org
>> So many I love were not yet born. also see:
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